Enable Ctrl-Alt-Backspace in Ubuntu/Kubuntu 10.04(Lucid Lynx)

Since Ubuntu 9.04, the Ctrl-Alt-Backspace key combination to force a restart of X is now disabled by default, to eliminate the problem of accidentally triggering the key combination. In addition, the Ctrl-Alt-Backspace option is now configured as an X keymap (XKB) option, replacing the X server "DontZap" option and allowing per-user configuration of this setting.
As a result, enabling or disabling the Ctrl+Alt+Backspace shortcut can now be done easily from the desktop.

Enabling Ctrl-Alt-Backspace for Ubuntu 10.04

* Select "System"->"Preferences"->"Keyboard"

* Select the "Layouts" tab and click on the "Layout Options" button.

* Select "Key sequence to kill the X server" and enable "Control + Alt + Backspace".

Enabling Ctrl-Alt-Backspace for Kubuntu 10.04

* Click on the Application launcher and select "System Settings"

* Click on "Regional & Language".

* Select "Keyboard Layout".

* Click on "Enable keyboard layouts" (in the Layout tab).

* Select the "Advanced" tab. Then select "Key sequence to kill the X server" and enable "Control + Alt + Backspace".

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11 Responses

  1. dadsbrkn says:

    I’ve been missing that for a long time, thanks for the tip.

  2. me says:


  3. Chris P says:

    Very sexy. Thanks very much!

  4. agatzebluz says:

    Very simple and useful.

  5. For the command line, it’s

    setxkbmap -option terminate:ctrl_alt_bksp

    to enable Ctrl-Alt-Backspace.


  6. Juanjo says:

    Thank you so much! I really wanted this back :))

  7. naidherng says:

    Thank you.

  8. Dan T says:

    ubuntu linux 10.04 ctrl-alt-backspace ??

    Restart with alt-SysRq-K works for me.
    No re-programming required. I’m using GNOME 2.30.2

  9. mastapat11 says:

    @Dan T:
    what is SysRq?

  10. Achim Settelmeier says:

    @mastapat11: SysRq is a key on the keyboard, usually right of F12.


  11. bhl says:

    Good work, even Canonical is getting a bit to fascist these days.

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